Feature●[6.5" Speaker Spacer] Good for DIY car audio modification project. Fit for Subaru Forester Rear Door.●[Size] Outer Diameter: 163mm / 6.42";Inner Diameter: 143mm / 5.63"; Depth: 27mm / 1.06"●[Easy Installation] Utilizes existing vehicle mounting points, and requires no cutting or drilling.●[Function] Effective to stop the speaker installation location of the resonance.●[Durable Material] It is made of plastic that is useful and long service life.Description